if (document.images) {
image1on = new Image();
image1on.src = "common/nvabt.jpg";

image2on = new Image();
image2on.src = "common/nvcon.jpg";

image3on = new Image();
image3on.src = "common/nvair.jpg";

image4on = new Image();
image4on.src = "common/nvchart.jpg";

image5on = new Image();
image5on.src = "common/nvveh.jpg";

image6on = new Image();
image6on.src = "common/nvsed.jpg";

image7on = new Image();
image7on.src = "common/nvlimo.jpg";

image8on = new Image();
image8on.src = "common/nvcas.jpg";

image9on = new Image();
image9on.src = "common/nvvip.jpg";

image10on = new Image();
image10on.src = "common/nvultra.jpg";

image11on = new Image();
image11on.src = "common/nvsuv.jpg";

image12on = new Image();
image12on.src = "common/nvexe.jpg";

image13on = new Image();
image13on.src = "common/nvmay.jpg";

image14on = new Image();
image14on.src = "common/nvhum.jpg";

image15on = new Image();
image15on.src = "common/nvprty.jpg";

image16on = new Image();
image16on.src = "common/nvpass.jpg";












image1off = new Image();
image1off.src = "common/nvabt.jpg";

image2off = new Image();
image2off.src = "common/nvcon.jpg";

image3off = new Image();
image3off.src = "common/nvair.jpg";

image4off = new Image();
image4off.src = "common/nvchart.jpg";

image5off = new Image();
image5off.src = "common/nvveh.jpg";

image6off = new Image();
image6off.src = "common/nvsed.jpg";

image7off = new Image();
image7off.src = "common/nvlimo.jpg";

image8off = new Image();
image8off.src = "common/nvcas.jpg";

image9off = new Image();
image9off.src = "common/nvvip.jpg";

image10off = new Image();
image10off.src = "common/nvultra.jpg";

image11off = new Image();
image11off.src = "common/nvsuv.jpg";

image12off = new Image();
image12off.src = "common/nvexe.jpg";

image13off = new Image();
image13off.src = "common/nvmay.jpg";

image14off = new Image();
image14off.src = "common/nvhum.jpg";

image15off = new Image();
image15off.src = "common/nvprty.jpg";

image16off = new Image();
image16off.src = "common/nvpass.jpg";

}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}